WO2017050060A1

WO2017050060A1 - Method and device for implementing listen-before-talk

Info

Publication number: WO2017050060A1
Application number: PCT/CN2016/094962
Authority: WO
Inventors: 苟伟; 毕峰; 赵亚军; 杨玲
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-09-25
Filing date: 2016-08-12
Publication date: 2017-03-30
Also published as: CN112584359A; CN106559908B; CN106559908A

Abstract

A method for implementing listen-before-talk (LBT) comprises: a station perform detection on whether an unlicensed carrier is clear during a specific clear channel assessment (CCA) time slot of an initial CCA stage; if not, then generate a random backoff value; and then the station perform detection on whether the unlicensed carrier is clear in a first delay period, and if so, then the station determines whether the random backoff value is equal to 0, wherein a duration of the first delay period is [16+9×(n+k)] μs, n is an integer greater than or equal to 1, k is an integer greater than or equal to 0, and if n = 1, then k = 1. By using the above solution, the present invention allows the station to perform the step of determining whether the random backoff value is 0 only if the unlicensed carrier is clear during the first delay period, and the first delay period 34 μs with n equal to 1, thus enabling unbiased competition with a WiFi system.

Description

Method and device for realizing first listening and speaking

Technical field

The present application relates to, but is not limited to, the field of unlicensed carriers, and more particularly to a method and apparatus for implementing Listening Before Talk (LBT).

Background technique

Currently, the communication networks of Long Term Evolution (LTE) are deployed in licensed carriers. With the development of LTE, some companies have proposed "recommended to study the issue of LTE deployment in unlicensed carriers." For example, Qualcomm in the United States believes that with the rapid growth of data services, authorized carriers will not be able to withstand fast in the near future. The huge amount of data brought about by business growth. Considering that LTE is deployed in an unlicensed carrier to share the data traffic in the authorized carrier, the data volume pressure brought by the service growth can be solved. Moreover, the unlicensed carrier has the following characteristics: on the one hand, since the unlicensed carrier does not need to be purchased, or the carrier resource is zero cost, the unlicensed carrier is free or low-cost; on the other hand, since the individual and the enterprise can participate in the deployment, the device The quotient equipment is also available, so the admission requirements of the unlicensed carrier are low; in addition, the unlicensed carrier is shared, and some sharing can be considered when multiple different systems are operating at the same time or when different operators of the same system operate. The way resources are used to improve carrier efficiency.

In summary, although LTE deployment has obvious advantages in unlicensed carriers, there are still problems in the process of deployment; mainly including: multiple radio access technologies (cross-different communication standards, difficult cooperation, network topology) Multiple) and wireless access sites (large number of users, difficult collaboration, centralized management overhead). Due to the large number of wireless access technologies, there will be various wireless systems in the unlicensed carrier, which are difficult to coordinate with each other and have serious interference. Therefore, for LTE deployment in unlicensed carriers, there is still a need to support the regulation of unlicensed carriers. Most countries require the system to support the LBT mechanism when deployed in unlicensed carriers. The LBT mechanism can avoid interference caused by the simultaneous use of unlicensed carriers between adjacent systems. And further enter the competitive fallback mechanism, that is, the neighboring system sites (generally the neighboring transit nodes of the same system) can avoid the interference caused by the adjacent transmitting nodes of the same system simultaneously using the unlicensed carriers through the competitive backoff mechanism.

Currently, LTE is investigating the deployment of LTE in unlicensed carriers (called LAA systems). Most of these companies believe that the LAA system downlink will adopt a competitive fallback mechanism to achieve preemption of unauthorized carrier usage rights. However, it has not yet been determined that it is suitable for the LAA system, especially after considering the relative fairness of the competition mechanism of the WiFi system, the flow chart of the currently disclosed method for realizing the LBT is as shown in FIG. 1 , and the method generally includes:

Step 100: The station determines whether there is data to be sent. If yes, step 101 is performed, and if not, step 100 is continued.

Step 101: The station detects whether the unlicensed carrier is idle in a designated Clear Channel Assessment (CCA) slot of the initial CCA stage. If yes, step 102 is performed, and if not, step 104 is performed.

In this step, the time of the designated CCA slot of the initial CCA stage may be 9 microseconds (μs).

Step 102: The station detects whether the unlicensed carrier is idle within the delay period. If yes, step 103 is performed, and if not, returns to step 101.

In this step, the delay period may be (16+9n) μs, and n is an integer greater than or equal to 1.

Step 103: The station transmits a data packet, and determines whether to continue the transmission. If yes, step 104 is performed, and if not, return to step 100.

Steps 100 to 103 are initial CCA stages.

Step 104: The station generates a random backoff value N.

In this step, the generated random backoff value N is in the range of [0, q-1].

Where q is the length of the competition window.

Among them, q can be adjusted in a dynamic or semi-static manner.

Step 105: The station detects whether the unlicensed carrier is idle during the delay period. If yes, step 106 is performed. If not, step 105 is continued.

Step 106: The station determines whether N is equal to 0. If yes, returns to step 103. If not, step 107 is performed.

Step 107: The station executes N=N-1, or does nothing.

Step 108: Do not perform sensing in the extended CCA (eCCA) time slot, and perform step 105, or the station detects whether the unlicensed carrier is idle in the extended CCA time slot, and if yes, returns to the step 106, if not, return to step 105.

Steps 104 to 108 are extended CCA stages.

Wherein, when neither step 107 nor step 108 returns to step 105 without performing any action, a self-delay mechanism is implemented.

In the related method for implementing the LBT, if the station detects that the unlicensed carrier is idle in the CCA slot in the initial CCA phase, it directly enters the extended CCA phase, if the generated N value is 0, and the detected unlicensed carrier is delayed. When the value of n is idle, when the value of n is 1, the station only detects 25μs idle for data transmission, and the WiFi system needs to detect 34μs idle for data transmission. Therefore, the fairness of competition with the WiFi system is low.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

The embodiment of the invention provides a method and a device for implementing listening and speaking, which can improve the fairness of competition with the WiFi system.

In a first aspect, an embodiment of the present invention provides a method for implementing listening and speaking, including:

The station detects whether the unlicensed carrier is idle in the designated CCA time slot of the initial idle channel assessment (CCA) phase; if not, generates a random backoff value;

Then the station detects whether the unlicensed carrier is idle in the first delay period, and if so, proceeds to the step of determining whether the random backoff value is equal to 0; wherein the duration of the first delay period is [16+9×(n) +k)] μs, n is an integer greater than or equal to 1, k is an integer greater than or equal to 0, and when n is equal to 1, k is equal to 1.

Optionally, when it is detected that the unlicensed carrier is idle in a specified CCA time slot of the initial CCA phase, the method further includes:

Determining, by the station, whether the unlicensed carrier is idle in a second delay period, and if not, continuing to perform the step of detecting whether the unlicensed carrier is idle in a designated CCA slot in an initial CCA phase; wherein The duration of the second delay period is (16 + 9n) μs.

Optionally, when detecting that the unlicensed carrier is idle during the second delay period, the party The law also includes:

The station transmits a data packet and proceeds to perform the step of determining whether to continue the transmission.

Alternatively, when n is greater than 1, the k is equal to 0 or 1.

Optionally, the detecting that the unlicensed carrier is idle during the first delay period includes:

The station first performs (n+k) times of detecting the CCA time slot on the unlicensed carrier, if idle is detected (n+k) times, and the unlicensed carrier is detected to be idle within 16 μs. ;

Alternatively, the station first detects that the unlicensed carrier is idle within 16 μs, and then performs (n+k) times of detecting the CCA time slot on the unlicensed carrier, if (n+k) times are detected. idle.

In a second aspect, the embodiment of the present invention further provides a method for implementing the first listening, including:

The station detects whether the unlicensed carrier is idle in the designated CCA time slot of the initial CCA phase; if not, generates a random backoff value;

The station then detects whether the unlicensed carrier is idle in the designated CCA slot of the extended CCA phase, and if so, whether the unlicensed carrier is idle during the second delay period or the third delay period, and if so, continues to perform the determination. The step of whether the random backoff value is equal to 0.

Optionally, before the station detects that the unlicensed carrier is idle in the designated CCA slot of the extended CCA phase, the method further includes:

The station determines whether the random backoff value is equal to 0, and when it is determined that the random backoff value is equal to zero.

Optionally, when the station determines that the random backoff value is not equal to 0, the method further includes:

The station performs the step of detecting whether the unlicensed carrier is idle during the second delay period.

Optionally, the duration of the second delay period is (16+9n) μs, n is an integer greater than or equal to 1, and the duration of the third delay period is [16+9×(n-1) ]μs;

The station detecting that the unlicensed carrier is idle during the second delay period or the third delay period includes:

The station first performs detection of n or (n-1) times of CCA slots for the unlicensed carrier, if idle is detected if n or (n-1) times, and the unlicensed carrier is detected again Idle in 16μs;

Alternatively, the station first detects that the unlicensed carrier is idle within 16 μs, and then performs n or (n-1) times of detecting the CCA slot on the unlicensed carrier, if n or (n-1) Idle is detected every time.

Optionally, when the station detects that the unlicensed carrier is busy in a specified CCA time slot of the extended CCA stage, the method further includes:

The station proceeds with the step of detecting whether the unlicensed carrier is idle within a designated CCA slot of the extended CCA phase.

In a third aspect, the embodiment of the present invention further provides a method for implementing the first listening, including:

The station detects whether the unlicensed carrier is idle in the designated CCA time slot of the initial CCA stage, and if not, generates a random backoff value; wherein the generated random backoff value is greater than or equal to 1, and less than or equal to q, q is a competition. The size of the window;

The station then detects whether the unlicensed carrier is idle during the second delay period, and if so, proceeds to the step of determining whether the random backoff value is equal to 0; wherein the duration of the second delay period is (16+9n) μs, n is an integer greater than or equal to 1.

Optionally, when the station determines to continue to transmit the data packet, the random backoff value is greater than or equal to 0 and less than or equal to (q-1).

In a fourth aspect, the embodiment of the present invention further provides a method for implementing the first listening, including:

The station detects whether the unlicensed carrier is idle in the designated CCA time slot of the initial CCA phase, and if not, generates a random backoff value;

The site adds a random backoff value to 1;

Then the station detects whether the unlicensed carrier is idle in the second delay period, and if so, proceeds to the step of determining whether the random backoff value after adding 1 is equal to 0; wherein the duration of the second delay period is (16+) 9n) μs, n is an integer greater than or equal to 1.

The station detects whether the unlicensed carrier is idle during the second delay period, and if not, proceeds to perform the step of detecting whether the unlicensed carrier is idle in the designated CCA slot of the initial CCA phase.

Optionally, when it is detected that the unlicensed carrier is idle in the second delay period, the method further includes:

The station transmits a data packet and determines whether to continue the transmission, and if not, proceeds to the step of determining whether data needs to be transmitted.

Optionally, when the station determines to continue to transmit the data packet, the method further includes:

The station generates the random backoff value, detects that the unlicensed carrier is idle in the second delay period, and continues to perform the step of determining whether the random backoff value is equal to zero.

In a fifth aspect, the embodiment of the present invention further provides a method for implementing the first listening, including:

The station detects whether the unlicensed carrier is idle in the designated CCA time slot of the initial CCA phase, and if yes, detects whether the unlicensed carrier is idle in the second delay period, and if not, generates a random backoff value; wherein, the second The duration of the delay period is (16+9n) μs, and n is an integer greater than or equal to 1;

The station detects whether the unlicensed carrier is idle in the second delay period, and if so, proceeds to the step of determining whether the random backoff value is equal to zero.

In a sixth aspect, the embodiment of the present invention further provides an apparatus for implementing listening and speaking, including at least:

a first detecting module, configured to detect whether the unlicensed carrier is idle in a designated CCA time slot of the initial CCA stage, if not, send a first notification message to the first generating module; and detect that the unlicensed carrier is in the first delay period Whether it is idle, if yes, sending a second notification message to the first determining module, wherein the duration of the first delay period is [16+9×(n+k)]μs, and n is an integer greater than or equal to 1, k is an integer greater than or equal to 0, and when n is equal to 1, k is equal to 1;

a first generating module, configured to receive the first notification message, and generate a random backoff value;

The first determining module is configured to receive the second notification message, and continue to perform the step of determining whether the random backoff value is equal to zero.

Optionally, the first detecting module is further configured to:

When it is detected that the unlicensed carrier is idle in a designated CCA time slot of the initial CCA phase, detecting whether the unlicensed carrier is idle in a second delay period, and if not, continuing to perform the detection non-authorization The step of whether the carrier is idle in a designated CCA slot of the initial CCA phase; wherein the duration of the second delay period is (16+9n) μs.

Optionally, the first detecting module is further configured to: when detecting that the unlicensed carrier is idle in the second delay period, send a third notification message to the first sending module;

The device further includes: a first sending module, configured to receive the third notification message, and transmit a data packet;

The first determining module is further configured to: continue to perform the step of determining whether to continue the transmission.

Optionally, the first detecting module is configured to:

Detecting whether the unlicensed carrier is idle in the designated CCA time slot of the initial CCA stage, if not, sending the first notification message to the first generating module; first performing (n+k) times of the CCA to the unlicensed carrier Detection of the gap, if idle is detected (n+k) times, and the unlicensed carrier is detected to be idle within 16 μs; or, the unlicensed carrier is first detected to be idle within 16 μs, and then the non- The authorized carrier sequentially performs detection of (n+k) times of CCA slots, and if idle detection is detected (n+k) times, the second notification message is sent to the first determining module.

In a seventh aspect, the embodiment of the present invention further provides an apparatus for implementing listening and speaking, including at least:

a second detecting module, configured to detect whether the unlicensed carrier is idle in a designated CCA time slot of the initial CCA stage, and if not, send a fourth notification message to the second generating module; and detecting that the unlicensed carrier is in the extended CCA stage Determining whether the CCA time slot is idle, if yes, detecting whether the unlicensed carrier is idle in the second delay period or the third delay period, and if yes, sending a fifth notification message to the second determining module;

a second generating module, configured to receive the fourth notification message, and generate a random backoff value;

The second determining module is configured to receive the fifth notification message, and continue to perform the step of determining whether the random backoff value is equal to 0.

Optionally, the second determining module is further configured to: determine whether the random backoff value is equal to 0, and if yes, send a sixth notification message to the second detecting module;

The second detection module is configured to:

Detecting whether the unlicensed carrier is idle in a specified CCA time slot of the initial CCA stage, if not, sending a fourth notification message to the second generating module; receiving the sixth notification message, detecting that the unlicensed carrier is in the extended CCA stage Specifying whether the CCA time slot is idle, if yes, detecting whether the unlicensed carrier is idle in the second delay period or the third delay period, and if so, the second judgment The breaking module sends a fifth notification message.

Optionally, the second determining module is further configured to: determine that the random backoff value is not equal to 0, and send a seventh notification message to the second detecting module;

The second detecting module is further configured to: receive the seventh notification message, and perform the step of detecting whether the unlicensed carrier is idle in the second delay period.

Optionally, the second detection module is configured to:

Detecting whether the unlicensed carrier is idle in a designated CCA time slot of the initial CCA stage, and if not, transmitting a fourth notification message to the second generation module; detecting whether the unlicensed carrier is idle in the designated CCA time slot of the extended CCA phase If yes, the detection of the CCA time slot of n or (n-1) times is performed on the unlicensed carrier, if the idle is detected in n or (n-1) times, and the non-detection is detected again. The authorized carrier is idle within 16 μs; or, the unlicensed carrier is first detected to be idle within 16 μs, and then the unlicensed carrier is sequentially subjected to detection of n or (n-1) times of CCA slots, if n or ( If the idle is detected, the fifth notification message is sent to the second determining module.

Optionally, the second detecting module is further configured to: detect that the unlicensed carrier is busy in a designated CCA time slot of the extended CCA stage, and continue to perform detection of the unlicensed carrier in the extended CCA stage. Specifies the step of whether the CCA slot is idle.

In an eighth aspect, the embodiment of the present invention further provides an apparatus for implementing listening and speaking, including at least:

a third detecting module, configured to detect whether the unlicensed carrier is idle in a designated CCA time slot of the initial CCA stage, and if not, send an eighth notification message to the third generating module; and detecting the unlicensed carrier in the second delay period Whether it is idle, if yes, sending a ninth notification message to the third determining module; wherein, the duration of the second delay period is (16+9n) μs, and n is an integer greater than or equal to 1;

The third generating module is configured to receive the eighth notification message, and generate a random backoff value; wherein the generated random backoff value is greater than or equal to 1, and less than or equal to q, q is a size of the contention window;

The third determining module is configured to receive the ninth notification message, and continue to perform the step of determining whether the random backoff value is equal to zero.

In a ninth aspect, the embodiment of the present invention further provides an apparatus for implementing listening and speaking, including at least:

a fourth detection module configured to detect an unlicensed carrier at a specified CCA of the initial CCA stage Whether the gap is idle, if not, sending a tenth notification message to the fourth generating module; detecting whether the unlicensed carrier is idle in the second delay period, and if yes, sending the eleventh notification message to the fourth determining module; Wherein, the duration of the second delay period is (16+9n) μs, and n is an integer greater than or equal to 1;

The fourth generating module is configured to receive the tenth notification message, and generate a random backoff value;

a first calculation module, configured to add a random backoff value by one;

The fourth judging module is configured to receive the eleventh notification message, and continue to perform the step of determining whether the random backoff value after adding 1 is equal to 0.

In a tenth aspect, the embodiment of the present invention further provides an apparatus for implementing listening and speaking, including at least:

a fifth detecting module, configured to detect whether the unlicensed carrier is idle in a designated CCA slot in the initial CCA phase, and if yes, detecting whether the unlicensed carrier is idle in the second delay period, if not, then The fifth generation module sends a twelfth notification message; wherein, the duration of the second delay period is (16+9n) μs, and n is an integer greater than or equal to 1; detecting whether the unlicensed carrier is idle during the second delay period, If yes, sending a thirteenth notification message to the fifth determining module;

a fifth generation module, configured to receive the twelfth notification message, generating a random backoff value;

The fifth determining module is configured to receive the thirteenth notification message, and continue to perform the step of determining whether the random backoff value is equal to zero.

In an eleventh aspect, the embodiment of the present invention further provides a method for implementing the first listening, including:

Calculating the metric according to a detection result of detecting whether the unlicensed carrier is idle in each preset period in the observation window;

It is judged that the calculated metric is greater than the preset threshold, and the competition window is adjusted to be large, and the competition window after the adjustment is used to realize the process of listening first.

Optionally, when it is determined that the calculated metric quantity is less than or equal to the preset threshold, the method further includes:

The competition window is reduced or the competition window is adjusted to a minimum value, and the competition window after the small adjustment is used to implement the process of listening first.

Optionally, the detecting whether the unlicensed carrier is idle in each preset period in the observation window The test results calculate the metrics including:

Determining, by the quantity, the number of preset periods in which the detection result is busy, or the preset period is the number of CCA slots, or the number of preset periods in which the detection result is busy and is a CCA slot, or the detection result is busy. The cumulative duration, or the cumulative length of time that the test result is idle;

Or the ratio between the number of preset periods that are busy and the number of CCA slots in the observation window, or the number of preset periods in which the detection result is busy and is a CCA slot and the observation window The ratio between the number of CCA slots, or the ratio between the cumulative duration of the busy and the duration of the observation window, or the ratio between the cumulative duration of the idle and the duration of the observation window. .

Optionally, the method further includes:

Determining the priority level after listening to the service according to the service quality level of the service, and implementing the process of listening first and then using the parameter corresponding to the determined priority level;

Determining that the minimum contention window in the parameter corresponding to the determined priority level fails to obtain the unlicensed carrier for consecutive k1 times, or determines that the parameter corresponding to the determined priority level is used to obtain the unlicensed carrier in the initial CCA phase continuously for k2 times. The priority level will be raised first, where k1, k2 are integers greater than or equal to 1.

Optionally, the method further includes:

It is judged that the transmission discovery signal DRS is adjusted to the highest priority level after the first listening.

Optionally, the method further includes:

It is determined that different physical channels are transmitted at the same time, and the priority level that is first heard and then said is adjusted to the priority level corresponding to the physical channel with the highest quality of service level.

In a twelfth aspect, the embodiment of the present invention further provides an apparatus for implementing listening and speaking, including at least:

a second calculating module, configured to calculate a metric according to a detection result of detecting whether an unlicensed carrier is idle in each preset period in the observation window;

The sixth determining module is configured to determine that the calculated metric is greater than a preset threshold, and send a fifteenth notification message to the adjusting module;

The adjustment module is set to receive the fifteenth notification message, and the competition window is adjusted to be large, and the competition window after the adjustment is implemented to realize the process of listening first.

Optionally, the sixth determining module is further configured to: determine that the calculated metric quantity is less than or equal to the preset threshold, and send a sixteenth notification message to the adjusting module;

The adjusting module is further configured to: receive the sixteenth notification message, reduce the contention window or adjust the contention window to a minimum value, and use a competition window that is adjusted to achieve the first listening and then speaking. process.

Optionally, the second computing module is configured to:

Optionally, the device further includes: a determining module, configured to determine, according to a quality of service level of the service, a priority level that is said to be heard first, and a parameter corresponding to the determined priority level to implement a process of listening first;

The sixth judging module is further configured to: determine that the minimum contention window in the parameter corresponding to the determined priority level does not obtain the unlicensed carrier for consecutive k1 times, or determine that the parameter corresponding to the determined priority level is consecutive Acquiring an unlicensed carrier in the initial CCA phase, sending a seventeenth notification message to the adjustment module; wherein k1, k2 are integers greater than or equal to 1;

The adjustment module is further configured to: receive the 17th notification message, and increase the priority level after the first listening.

Optionally, the sixth determining module is further configured to: determine a transmission discovery signal DRS, and send an eighteenth notification message to the adjustment module;

The adjustment module is further configured to: receive the 18th notification message, and adjust the priority level after the first listening to the highest priority level.

Optionally, the sixth determining module is further configured to: determine that different physical channels are simultaneously transmitted, and send a nineteenth notification message to the adjusting module;

The adjusting module is further configured to: receive the nineteenth notification message, and adjust the priority level that is first heard and then to the priority level corresponding to the physical channel with the highest quality of service level.

In a thirteenth aspect, the embodiment of the present invention further provides a method for implementing the first listening, including:

Determining that there is data to be sent in the buffer area, or performing unlicensed carrier contention in multi-carrier aggregation or frequency reuse or uplink multi-user multiplexing, or determining that the generated random backoff value is greater than or equal to a preset threshold value, The self-delay mechanism is allowed to be executed after the time when the data arrives or the determined time for sending the data is obtained.

Optionally, the number of times the self-delay mechanism is performed is less than or equal to the preset threshold.

In a fourteenth aspect, the embodiment of the present invention further provides an apparatus for implementing listening and speaking, including at least:

The seventh judging module is configured to determine that there is data to be sent in the buffer area, or to perform unlicensed carrier competition when multi-carrier aggregation or frequency reuse or uplink multi-user multiplexing, or determine that the generated random backoff value is greater than or After being equal to the preset threshold, or determining that the data arrives, or obtaining the determined time for sending the data, sending a twentieth notification message to the execution module;

The execution module is configured to receive the twentieth notification message, allowing the self-delay mechanism to be performed.

The embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions, and when the computer executable instructions are executed, implementing the foregoing method of implementing the first aspect of the first aspect.

The embodiment of the present invention further provides a computer readable storage medium, which stores computer executable instructions, and when the computer executable instructions are executed, implements the foregoing method of implementing the second aspect.

The embodiment of the present invention further provides a computer readable storage medium, which stores computer executable instructions, and when the computer executable instructions are executed, implements the foregoing method of implementing the third aspect.

The embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions, and when the computer executable instructions are executed, the implementation of the fourth aspect is implemented. law.

The embodiment of the present invention further provides a computer readable storage medium, which stores computer executable instructions, and when the computer executable instructions are executed, implements the foregoing method of implementing the fifth aspect.

The embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions, and when the computer executable instructions are executed, implementing the foregoing method of implementing the first aspect of the eleventh aspect.

The embodiment of the present invention further provides a computer readable storage medium, which stores computer executable instructions, and when the computer executable instructions are executed, implements the above-mentioned implementation of the thirteenth aspect.

Compared with the related art, the technical solution of the embodiment of the present invention includes: the station detects whether the unlicensed carrier is idle in the designated CCA time slot of the initial CCA stage; if not, generates a random backoff value; the station detects the unlicensed carrier in the Whether the first delay period is idle, if yes, proceeding to the step of determining whether the random backoff value is equal to 0; wherein the duration of the first delay period is [16+9×(n+k)]μs,n For an integer greater than or equal to 1, k is an integer greater than or equal to 0, and when n is equal to 1, k is equal to 1. With the solution of the embodiment of the present invention, the station performs the step of determining whether the random backoff value is equal to 0 after detecting that the unlicensed carrier is idle in the first delay period, because the first delay period is 34 μs when n is equal to 1. Therefore, the fairness of competition with the WiFi system is improved.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

The drawings in the embodiments of the present invention are described below, and the accompanying drawings are used to explain the present application, and the present invention is not to be construed as limiting the scope of the application.

FIG. 1 is a flow chart of a related implementation of the method of listening first;

2 is a flowchart of a method for implementing a first listening and then speaking according to an embodiment of the present invention;

FIG. 3 is a flowchart of a second method for implementing listening and speaking according to an embodiment of the present invention; FIG.

4 is a flowchart of a third method for implementing listening and speaking after receiving an embodiment of the present invention;

FIG. 5 is a flowchart of a fourth method for implementing listening after listening according to an embodiment of the present invention; FIG.

FIG. 6 is a flowchart of a fifth method for implementing listening after listening according to an embodiment of the present invention; FIG.

FIG. 7 is a flowchart of a method for implementing a first listening after the first embodiment of the present application; FIG.

FIG. 8 is a flowchart of a method for implementing a first listening after the second embodiment of the present application; FIG.

FIG. 9 is a flowchart of a method for implementing a first listening after the third embodiment of the present application; FIG.

FIG. 10 is a flowchart of a method for implementing a first listening after the fourth embodiment of the present application; FIG.

FIG. 11 is a flowchart of a method for implementing a first listening after the fifth embodiment of the present application; FIG.

FIG. 12 is a flowchart of a method for implementing a first listening after the sixth embodiment of the present application; FIG.

FIG. 13 is a schematic structural diagram of a device for implementing a first listening device according to an embodiment of the present invention; FIG.

FIG. 14 is a schematic structural diagram of a second implementation of the device after listening to the first embodiment according to an embodiment of the present invention; FIG.

FIG. 15 is a schematic structural diagram of a third implementation of the device after listening to the first embodiment of the present invention; FIG.

FIG. 16 is a schematic structural diagram of a fourth apparatus for implementing a first listening and then speaking according to an embodiment of the present invention; FIG.

FIG. 17 is a schematic structural diagram of a fifth implementation of an apparatus for implementing listening and speaking according to an embodiment of the present invention; FIG.

FIG. 18 is a flowchart of a sixth implementation method for implementing listening after listening according to an embodiment of the present invention; FIG.

FIG. 19 is a schematic structural diagram of a sixth implementation apparatus for implementing listening after listening according to an embodiment of the present invention; FIG.

FIG. 20 is a flowchart of a seventh method for implementing listening after listening according to an embodiment of the present invention; FIG.

FIG. 21 is a schematic structural diagram of a seventh apparatus for implementing listening and speaking according to an embodiment of the present invention.

Embodiments of the invention

The present application is further described below in conjunction with the accompanying drawings, and is not intended to limit the scope of the application. It should be noted that the embodiments in the present application and the various manners in the embodiments may be combined with each other without conflict.

Referring to FIG. 2, an embodiment of the present invention provides a method for implementing an LBT, including the following steps:

Step 200: The station detects whether the unlicensed carrier is idle in the designated CCA time slot of the initial CCA phase; if not, generates a random backoff value.

In this step, the station may be a device that uses an unlicensed carrier to transmit data, such as a base station, and a mobile device. Terminal, etc.

In this step, how the site detects whether the unlicensed carrier is idle in the designated CCA slot in the initial CCA phase is a well-known technology of the present invention, and is not intended to limit the scope of protection of the present application, and details are not described herein again.

In this step, when it is detected that the unlicensed carrier is idle in the designated CCA time slot of the initial CCA phase, the station detects whether the unlicensed carrier is idle in the second delay period, and if not, continues to perform detection of the unlicensed carrier at the initial. The step of whether the CCA period is idle in the designated CCA slot; wherein the duration of the second delay period is (16+9n) microseconds (μs), and n is an integer greater than or equal to 1.

Wherein, when it is detected that the unlicensed carrier is idle in the second delay period, the station transmits a data packet, and continues to perform the step of determining whether to continue the transmission.

Step 201: The station detects whether the unlicensed carrier is idle in the first delay period, and if yes, continues to perform the step of determining whether the random backoff value is equal to 0.

In this step, the duration of the first delay period is [16+9×(n+k)]μs, n is an integer greater than or equal to 1, k is an integer greater than or equal to 0, and when n is equal to 1, k is equal to 1.

Wherein, when n is greater than 1, k is equal to 0 or 1.

The station detects that the unlicensed carrier is idle during the first delay period, including:

The station first performs (n+k) times of detecting the CCA time slot for the unlicensed carrier, if idle detection is detected for (n+k) times, and then detecting that the unlicensed carrier is idle within 16 μs;

Alternatively, the station first detects that the unlicensed carrier is idle within 16 μs, and then performs (n+k) times of detection of the CCA time slot on the unlicensed carrier, if idle is detected (n+k) times.

That is, the station divides the duration of [16+9×(n+k)]μs into (n+k) CCA slots and 16μs respectively, when detecting an unlicensed carrier in any one CCA slot or When busy within 16 μs, the unlicensed carrier is considered to be busy during the first delay period; when it is detected that the unlicensed carrier is idle in all CCA slots and within 16 μs, the unlicensed carrier is considered to be idle in the first delay period.

Wherein, when the station detects that the unlicensed carrier is busy in the first delay period, the station continues to perform the step of detecting whether the unlicensed carrier is idle within the first delay period.

In the above method, by setting the duration of the first delay period to [16+9×(n+k)]μs, and when n is equal to 1, k is equal to 1, ensuring that the station can perform 34 μs detection when n is equal to 1. Increase The fairness of competition with WiFi systems.

As shown in FIG. 3, the embodiment of the present invention further provides a method for implementing listening and speaking, including:

The station detects whether the unlicensed carrier is idle in the designated CCA time slot of the initial CCA phase; if not, generates a random backoff value; then the station detects whether the unlicensed carrier is idle in the designated CCA time slot of the extended CCA phase, and if so, Then, it is detected whether the unlicensed carrier is idle in the second delay period or the third delay period, and if yes, the step of determining whether the random backoff value is equal to 0 is continued.

The duration of the second delay period is (16+9n) μs, n is an integer greater than or equal to 1, and the duration of the third delay period is [16+9×(n-1)]μs.

The method further includes: before the station detects that the unlicensed carrier is idle in the designated CCA slot in the extended CCA phase, the method further includes:

Wherein, when the station detects that the unlicensed carrier is busy in the designated CCA slot of the extended CCA phase, the station continues to perform the step of detecting whether the unlicensed carrier is idle in the designated CCA slot of the extended CCA phase.

Wherein, when the station determines that the random backoff value is not equal to 0, the station performs a step of detecting whether the unlicensed carrier is idle in the second delay period.

The station detects that the unlicensed carrier is idle in the second delay period or the third delay period, including:

The station first performs detection of N or (n-1) times of CCA slots for the unlicensed carrier, and if idle is detected for n or (n-1) times, and then detects that the unlicensed carrier is idle within 16 μs;

Alternatively, the station first detects that the unlicensed carrier is idle within 16 μs, and then performs n or (n-1) times of detection of the CCA slot for the unlicensed carrier, if idle is detected for n or (n-1) times.

That is, the station divides the duration of (16+9n)μs or [16+9×(n-1)]μs into n or (n-1) CCA slots and 16μs respectively, when detecting non- When the authorized carrier is busy in any one CCA time slot or 16 μs, the unlicensed carrier is considered to be busy in the second delay period or the third delay period; when it is detected that the unlicensed carrier is idle in all CCA slots and 16 μs, The unlicensed carrier is considered to be idle during the second delay period or the third delay period.

As shown in FIG. 4, the embodiment of the present invention further provides a method for implementing listening and speaking, including:

The station detects whether the unlicensed carrier is idle in the designated CCA time slot of the initial CCA stage, and if not, generates a random backoff value; wherein the generated random backoff value is greater than or equal to 1, and less than or equal to q, q is a competition. The size of the window; then the station detects whether the unlicensed carrier is idle during the second delay period, and if so, proceeds to the step of determining whether the random backoff value is equal to zero.

The duration of the second delay period is (16+9n) μs, and n is an integer greater than or equal to 1.

Wherein, when the station determines to continue transmitting the data packet, the random backoff value is greater than or equal to 0 and less than or equal to (q-1).

After the above method is adopted, the generated random backoff value must not be equal to 0. Therefore, the station needs to detect at least that the unlicensed carrier is idle in the second delay period and the extended CCA slot, and then the data packet is transmitted, thereby improving the The fairness of competing with WiFi.

As shown in FIG. 5, the embodiment of the present invention further provides a method for implementing listening and speaking, including:

The station detects whether the unlicensed carrier is idle in the designated CCA time slot of the initial CCA stage, and if not, generates a random backoff value; the station adds a random backoff value to 1; then the station detects the unlicensed carrier in the second delay period. Whether it is idle, if yes, the step of judging whether the random backoff value after adding 1 is equal to 0 is continued; wherein the duration of the second delay period is (16+9n) μs, and n is an integer greater than or equal to 1.

Wherein, when detecting that the unlicensed carrier is idle in the designated CCA time slot of the initial CCA phase, the station detects whether the unlicensed carrier is idle in the second delay period, and if not, proceeds to perform detection of the unlicensed carrier in the initial CCA phase. The step of specifying whether the CCA slot is idle.

When it is detected that the unlicensed carrier is idle in the second delay period, the station transmits a data packet and determines whether to continue the transmission. If not, the step of determining whether data needs to be transmitted is continued.

When the station determines to continue to transmit the data packet, the station generates a random backoff value, detects that the unlicensed carrier is idle in the second delay period, and continues to perform the step of determining whether the random backoff value is equal to zero.

After the above method is used, the generated random backoff value must not be equal to 0 after being added to 1. Therefore, the station needs to detect at least that the unlicensed carrier is idle in the second delay period and the extended CCA slot. The transmission of data packets improves the fairness of competition with WiFi.

As shown in FIG. 6, the embodiment of the present invention further provides a method for implementing listening and speaking, including:

The station detects whether the unlicensed carrier is idle in the designated CCA time slot of the initial CCA phase, and if yes, detects whether the unlicensed carrier is idle in the second delay period, and if not, generates a random backoff value; wherein, the second The duration of the delay period is (16+9n) μs, and n is an integer greater than or equal to 1; the station detects whether the unlicensed carrier is idle in the second delay period, and if so, proceeds to determine whether the random backoff value is equal to 0 steps.

Through the above method, the station can enter the extended CCA stage after performing the detection of a second delay period, thereby saving the process, and the station obtains a larger gain when the unlicensed load is heavy.

The method of the present application is described in detail below by several embodiments.

The first embodiment, referring to FIG. 7, the method provided in this embodiment includes the following steps:

Step 300: The station determines whether there is data to be sent, if yes, step 301 is performed, and if not, step 300 is continued.

Step 301: The station detects whether the unlicensed carrier is idle in the designated CCA time slot of the initial CCA stage. If yes, step 302 is performed, and if not, step 304 is performed.

In this step, the duration of the designated CCA slot of the initial CCA phase may be 9 μs.

Step 302: The station detects whether the unlicensed carrier is idle in the second delay period. If yes, step 303 is performed, and if not, step 301 is returned.

In this step, the second delay period may be (16+9n) μs, and n is an integer greater than or equal to 1.

Step 303: The station transmits a data packet, and determines whether to continue the transmission. If yes, step 304 is performed, and if not, step 300 is returned.

Steps 300 to 303 are initial CCA stages.

Step 304: The station generates a random backoff value N.

In this step, the generated random backoff value N is in the range of [0, q-1].

Where q is the length of the competition window.

Among them, q can be adjusted in a dynamic or semi-static manner.

Step 305: The station detects whether the unlicensed carrier is idle in the first delay period, and if yes, Then step 306 is performed, and if not, step 305 is continued.

In this step, the duration of the first delay period may be [16+9×(n+k)]μs, n is an integer greater than or equal to 1, k is an integer greater than or equal to 0, and when n is equal to 1 , k is equal to 1.

Wherein, when n is greater than 1, k is equal to 0 or 1.

Step 306: The station determines whether N is equal to 0. If yes, returns to step 303. If not, step 307 is performed.

In step 307, the station performs N=N-1, or does nothing.

Step 308: No awareness is performed in the extended CCA slot, and step 305 is performed, or the station detects whether the unlicensed carrier is idle in the extended CCA slot. If yes, the process returns to step 306. If not, the process returns to step 305.

Steps 304 through 308 are stages of extending the CCA.

The second embodiment, referring to FIG. 8, the method provided in this embodiment includes the following steps:

Step 400: The station determines whether there is data to be sent. If yes, step 401 is performed, and if not, step 400 is continued.

Step 401: The station detects whether the unlicensed carrier is idle in the designated CCA time slot of the initial CCA stage. If yes, step 402 is performed, and if not, step 404 is performed.

In this step, the time of the designated CCA slot of the CCA stage may be 9 microseconds (μs).

Step 402: The station detects whether the unlicensed carrier is idle in the second delay period. If yes, step 403 is performed, and if not, step 401 is returned.

Step 403: The station transmits a data packet, and determines whether to continue the transmission. If yes, step 404 is performed, and if not, return to step 400.

Steps 400 to 403 are initial CCA stages.

Step 404: The station generates a random backoff value N.

In this step, when the initial CCA phase enters the extended CCA phase (that is, from step 402 to step 404), the generated random backoff value N is in the range of [1, q], and enters the extended CCA phase from the non-initial CCA phase. (ie, from step 403 to step 404), the resulting random back The return value N is in the range of [0, q-1].

Where q is the length of the competition window.

Among them, q can be adjusted in a dynamic or semi-static manner.

Step 405: The station detects whether the unlicensed carrier is idle in the second delay period. If yes, step 406 is performed. If not, step 405 is continued.

Step 406: The station determines whether N is equal to 0. If yes, returns to step 403. If not, step 407 is performed.

In step 407, the station performs N=N-1, or does nothing.

Step 408: Do not perform sensing in the extended CCA slot, and perform step 405, or the station detects whether the unlicensed carrier is idle in the extended CCA slot. If yes, return to step 406. If not, return to step 405.

Steps 404 to 408 are extended CCA stages.

The third embodiment, referring to FIG. 9, the method provided in this embodiment includes the following steps:

Step 500: The station determines whether there is data to be sent. If yes, step 501 is performed, and if not, step 500 is continued.

Step 501: The station detects whether the unlicensed carrier is idle in the designated CCA time slot of the initial CCA stage. If yes, step 502 is performed, and if not, step 504 is performed.

Step 502: The station detects whether the unlicensed carrier is idle in the second delay period. If yes, step 503 is performed, and if not, return to step 501.

Step 503: The station transmits a data packet, and determines whether to continue the transmission. If yes, step 504 is performed, and if not, return to step 500.

Steps 500 to 503 are initial CCA stages.

Step 504: The station generates a random backoff value N and adds N to 1.

In this step, the generated random backoff value N is in the range of [0, q-1].

Where q is the length of the competition window.

Among them, q can be adjusted in a dynamic or semi-static manner.

Step 505: The station detects whether the unlicensed carrier is idle in the second delay period. If yes, step 506 is performed. If not, step 505 is continued.

Step 506: The station determines whether N is equal to 0. If yes, returns to step 503. If not, step 507 is performed.

In step 507, the station performs N=N-1, or does nothing.

Step 508: No awareness is performed in the extended CCA slot, and step 505 is performed, or the station detects whether the unlicensed carrier is idle in the extended CCA slot. If yes, the process returns to step 506. If not, the process returns to step 505.

Steps 504 to 508 are extended CCA stages.

The fourth embodiment, referring to FIG. 10, the method provided in this embodiment includes the following steps:

Step 600: The station determines whether there is data to be sent. If yes, step 601 is performed, and if not, step 600 is continued.

Step 601: The station detects whether the unlicensed carrier is idle in the designated CCA time slot of the initial CCA stage. If yes, step 602 is performed, and if not, step 604 is performed.

Step 602: The station detects whether the unlicensed carrier is idle in the second delay period. If yes, step 603 is performed, and if not, step 604 is performed.

Step 603: The station transmits a data packet, and determines whether to continue the transmission. If yes, step 604 is performed, and if not, return to step 600.

Step 600 to step 603 are initial CCA stages.

Step 604: The station generates a random backoff value N.

In this step, the generated random backoff value N is in the range of [0, q-1].

Where q is the length of the competition window.

Among them, q can be adjusted in a dynamic or semi-static manner.

Step 605: The station detects whether the unlicensed carrier is idle in the second delay period, and if yes, Then step 606 is performed, and if not, step 605 is continued.

Step 606: The station determines whether N is equal to 0. If yes, the process returns to step 603. If not, step 607 is performed.

In step 607, the station performs N=N-1, or does nothing.

Step 608: No awareness is performed in the extended CCA slot, and step 605 is performed, or the station detects whether the unlicensed carrier is idle in the extended CCA slot. If yes, the process returns to step 606. If not, the process returns to step 605.

Steps 604 to 608 are stages of extending the CCA.

The fifth embodiment, referring to FIG. 11, the method provided in this embodiment includes the following steps:

Step 700: The station determines whether there is data to be sent, if yes, step 701 is performed, and if not, step 700 is continued.

Step 701: The station detects whether the unlicensed carrier is idle in the designated CCA time slot of the initial CCA stage. If yes, step 702 is performed, and if not, step 704 is performed.

Step 702: The station detects whether the unlicensed carrier is idle in the second delay period. If yes, step 703 is performed, and if not, step 701 is returned.

Step 703: The station transmits a data packet, and determines whether to continue the transmission. If yes, step 711 or step 704 is performed, and if not, return to step 700.

Steps 700 to 703 are initial CCA stages.

Step 704: The station generates a random backoff value N.

In this step, the generated random backoff value N is in the range of [0, q-1].

Where q is the length of the competition window.

Among them, q can be adjusted in a dynamic or semi-static manner.

Step 705: The station determines whether N is equal to 0. If yes, step 706 is performed, and if not, step 707 is performed.

Step 706: The station detects that the unlicensed carrier is in the designated CCA slot of the extended CCA phase. No, if yes, go to step 707, if not, continue to step 706.

Step 707: The station detects whether the unlicensed carrier is idle in the second delay period. If yes, step 708 is performed. If not, step 707 is continued.

Step 708: The station determines whether N is equal to 0. If yes, returns to step 703. If not, step 709 is performed.

In step 709, the station performs N=N-1, or does nothing.

Step 710: No awareness is performed in the extended CCA slot, and step 707 is performed, or the station detects whether the unlicensed carrier is idle in the extended CCA slot. If yes, the process returns to step 708. If not, the process returns to step 707.

Steps 704 to 710 are extended CCA stages.

Step 711: The station generates a random backoff value N, and proceeds to step 707.

Sixth Embodiment, referring to FIG. 12, the method of this embodiment includes the following steps:

Step 800: The station determines whether there is data to be sent. If yes, step 801 is performed, and if not, step 800 is continued.

Step 801: The station detects whether the unlicensed carrier is idle in the designated CCA time slot of the initial CCA stage. If yes, step 802 is performed, and if not, step 804 is performed.

Step 802: The station detects whether the unlicensed carrier is idle in the second delay period. If yes, step 803 is performed, and if not, step 801 is returned.

Step 803: The station transmits a data packet, and determines whether to continue the transmission. If yes, step 810 or step 804 is performed, and if not, step 700 is performed.

Step 800 to step 803 are initial CCA stages.

Step 804: The station generates a random backoff value N.

In this step, the generated random backoff value N is in the range of [0, q-1].

Where q is the length of the competition window.

Among them, q can be adjusted in a dynamic or semi-static manner.

Step 805: The station detects whether the unlicensed carrier is idle in the designated CCA time slot of the extended CCA stage. If yes, step 806 is performed. If not, step 805 is continued.

Step 806: The station detects whether the unlicensed carrier is idle in the second delay period. If yes, step 807 is performed. If not, step 806 is continued.

Step 807: The station determines whether N is equal to 0. If yes, returns to step 803. If not, step 808 is performed.

In step 808, the station performs N=N-1, or does nothing.

Step 809: No awareness is performed in the extended CCA slot, and step 806 is performed, or the station detects whether the unlicensed carrier is idle in the extended CCA slot. If yes, the process returns to step 807. If not, the process returns to step 806.

Steps 804 to 809 are stages of extending the CCA.

Step 810: The station generates a random backoff value N, and proceeds to step 806.

The first embodiment to the sixth embodiment can be used in combination.

Referring to FIG. 13, an embodiment of the present invention further provides an apparatus for implementing listening and speaking, including at least:

The functions of the first determining module, the first detecting module, and the first generating module may be implemented by a processor executing a program/instruction stored in a memory, and may also be implemented by a firmware/logic circuit/integrated circuit.

In the apparatus of the embodiment of the present invention, the first detecting module is further configured to: detect whether the unlicensed carrier is idle in the second delay period, and if not, continue to perform the detecting the unlicensed carrier at the beginning The step of whether the CCA slot in the initial CCA phase is idle; wherein the duration of the second delay period is (16+9n) μs.

In the apparatus of the embodiment of the present invention, the first detecting module is further configured to: when detecting that the unlicensed carrier is idle in the second delay period, send a third notification message to the first sending module;

In the apparatus of the embodiment of the present invention, the first detecting module is configured to: detect whether the unlicensed carrier is idle in the designated CCA time slot of the initial CCA stage, and if not, send the first notification message to the first generating module; The authorized carrier sequentially performs detection of (n+k) times of CCA slots, if idle is detected (n+k) times, and the unlicensed carrier is detected to be idle within 16 μs; or, the first detected The unlicensed carrier is idle within 16 μs, and then the (N+k) times of detection of the CCA time slot is performed on the unlicensed carrier. If the idle detection is detected (n+k) times, the second notification is sent to the first determining module. Message.

Referring to FIG. 14, an embodiment of the present invention further provides an apparatus for implementing listening and speaking, including at least:

a second detecting module, configured to detect whether the unlicensed carrier is idle in the designated CCA time slot of the initial CCA stage, if not, send a fourth notification message to the second generating module; and detect the designated CCA of the unlicensed carrier in the extended CCA stage Whether the slot is idle, if yes, detecting whether the unlicensed carrier is idle in the second delay period or the third delay period, and if yes, sending a fifth notification message to the second determining module;

The functions of the second determining module, the second detecting module, and the second generating module may be implemented by a processor executing a program/instruction stored in a memory, and may also be implemented by a firmware/logic circuit/integrated circuit.

In the apparatus of the embodiment of the present invention, the second determining module is further configured to: determine whether the random backoff value is equal to 0, and if yes, send a sixth notification message to the second detecting module;

The second detecting module is configured to: detect whether the unlicensed carrier is idle in a designated CCA time slot of the initial CCA stage, and if not, send a fourth notification message to the second generating module; and receive the sixth notification message, Detecting whether the unlicensed carrier is idle in the designated CCA time slot of the extended CCA phase, and if yes, detecting whether the unlicensed carrier is idle in the second delay period or the third delay period, and if yes, proceeding to the second determining module Send a fifth notification message.

In the device of the embodiment of the present invention, the second determining module is further configured to: determine that the random backoff value is not equal to 0, and send a seventh notification message to the second detecting module;

In the apparatus of the embodiment of the present invention, the second detecting module is configured to: detect whether the unlicensed carrier is idle in a specified CCA time slot of the initial CCA stage, and if not, send a fourth notification message to the second generating module; Whether the unlicensed carrier is idle in the designated CCA slot in the extended CCA phase, and if so, first performs the detection of n or (n-1) times of the CCA slot for the unlicensed carrier, if n or (n-1) The idle detection is idle, and the unlicensed carrier is detected to be idle within 16 μs; or, the unlicensed carrier is first detected to be idle within 16 μs, and then the unlicensed carrier is sequentially executed n or (n-1) times. The detection of the CCA slot, if idle is detected in n or (n-1) times, sends a fifth notification message to the second judging module.

In the apparatus of the embodiment of the present invention, the second detecting module is further configured to: detect that the unlicensed carrier is busy in a designated CCA time slot of the extended CCA stage, and continue to perform detection of the unlicensed carrier in the extended CCA The step of specifying whether the phase is free in the CCA slot.

Referring to FIG. 15, an embodiment of the present invention further provides an apparatus for implementing listening, including at least:

The third determining module is configured to receive the ninth notification message, and continue to perform the determining the random backoff value Whether it is equal to 0 steps.

The functions of the third determining module, the third detecting module, and the third generating module may be implemented by a processor executing a program/instruction stored in the memory, and may also be implemented by a firmware/logic circuit/integrated circuit.

Referring to FIG. 16, an embodiment of the present invention further provides an apparatus for implementing listening and speaking, including at least:

a fourth detecting module, configured to detect whether the unlicensed carrier is idle in a designated CCA time slot of the initial CCA stage, and if not, send a tenth notification message to the fourth generating module; and detecting that the unlicensed carrier is in the second delay period Whether it is idle, if yes, sending an eleventh notification message to the fourth determining module; wherein, the duration of the second delay period is (16+9n) μs, and n is an integer greater than or equal to 1;

a first calculation module, configured to add a random backoff value by one;

The functions of the fourth determining module, the fourth detecting module, the fourth generating module, and the first calculating module may be implemented by a processor executing a program/instruction stored in the memory, and may also be implemented by a firmware/logic circuit/integrated circuit. .

Referring to FIG. 17, an embodiment of the present invention further provides an apparatus for implementing listening and speaking, including at least:

The functions of the fifth determining module, the fifth detecting module, and the fifth generating module may be implemented by a processor executing a program/instruction stored in the memory, and may also be through a firmware/logic circuit/set Into a circuit implementation.

The embodiment of the present invention proposes eight ways to implement the process of listening first, which is described as follows.

method one

Based on the flowchart illustrated in FIG. 1, when the duration of the delay period in the initial CCA phase is set to (16+n*9)us, then the duration of the delay period in the extended CCA is set to (16+(n+k)). *9) us (here only indicates the duration, not distinguishing between n 9us CCA slots and 16us CCA detection before and after the sequence). Where n is a positive integer and k is 0 or a positive integer.

When n is equal to 1, the length of the delay period in the extended CCA is set, and the configuration k is only 1. In this way, it is possible to overcome the requirement that the idle time in the unlicensed carrier is not less than 34 us before the station first transmits data (or before obtaining the unlicensed carrier usage right) in FIG. 1 . If this is not the case, then in the following cases, there will be cases where the site does not satisfy the above conditions. For example, if the delay period n is configured to be 1, then when the station performs the initial CCA, the CCA of one slot is detected as busy, then the station enters the extended CCA phase, randomly generates a backoff value N, exactly N=0, and then executes the delay. Periodic CCA detection, if the CCA detection of the delay period is idle, the station will obtain the right to use the unlicensed carrier. At this time, the total duration of the unlicensed carrier idle experienced by the station is the duration of the delay period idle, which is (16+1*9) us (ie, 25 us). After the parameter configuration described above, the flow of the site does not change, but since the delay period of the extended CCA phase is (16+(1+1)*9)us (ie 34us), the site experiences non-destruction at this time. The total duration of the authorized carrier idle is the duration of the delay period idle, which is (16+(1+1)*9)us (ie 34us). Meet the above requirements, thus ensuring the fairness of the LAA system and the WiFi system.

The above settings can always exist regardless of whether n is 1. Alternatively, the above setting may be set only for the case where n is 1. Thus, when n is greater than 1, the station allows setting k in the delay period in the extended CCA to be 0 or 1.

Way two

The problem to be solved is described in the first method.

Based on Figure 1, when the site performs the extended CCA phase, the generation range of the limit N is [1, q]. This avoids the case where N is randomly generated to be 1, and the above problem can be overcome. In order not to affect the impact of entering the extended CCA phase from other portals, it may be that when the site enters the expansion from a non-initial CCA When the CCA phase is exhibited, the range of N randomly generated by the station is [0, q-1], and the range of the restriction N from the initial CCA to the extended CCA stage is [1, q]. It is also possible to limit the value of N to [1, q] for all entering the extended CCA phase.

Way three

Still based on Figure 1. After the site generates a random backoff N value, the station performs N=N+1 and then uses the new N value as the random backoff N value. Similarly, the site is also allowed. When the station enters the extended CCA phase from the non-initial CCA, the site limit N is generated in the range [0, q-1], and N=N+1 is not performed. Similarly, when the station enters the extended CCA phase from the initial CCA phase, the site limit N value is generated in the range [0, q-1], and N=N+1 is performed.

Way four

Referring to Figure 10, based on Figure 1, Mode 4 is modified for the initial CCA phase of Figure 1.

The station starts from whether to send data, and if it needs to send data, the station performs a CCA time slot detection;

When the detection is idle, the delay period CCA detection is entered. If the delay period CCA detection is idle, the station starts to transmit data; if the delay period CCA detection is busy, the station enters the extended CCA stage.

When detected as busy, the site enters the extended CCA phase.

Other processes can refer to Figure 1.

Compared with the flow of FIG. 1, when a CCA slot in the initial CCA phase is detected as idle, in the fourth mode, the station only needs to perform a delay cycle CCA detection to enter the extended CCA phase, and in FIG. 1, the site performs After a delay period CCA detection, a CCA slot detection is required to determine whether the extended CCA stage can be entered. It can be seen that Mode 4 is faster, and this feature will achieve greater gain in the case of unlicensed loads.

Way five

It is still modified based on the flow of Figure 1, mainly for the extended CCA phase, overcoming the problems mentioned in Mode 1.

Referring to FIG. 11, based on FIG. 1, when the station enters the extended CCA stage, the station generates a random backoff N value, and determines whether N is 0.

When N = 0, the station performs a CCA slot detection. When it is detected as idle, the station enters a delay period CCA detection; when it is detected to be busy, the station continues to perform CCA detection of the one slot.

When N is non-zero, the station enters the delay period CCA detection.

The above approach is for the site to enter the extended CCA phase from the initial CCA. It can also be applied to other ways to enter the extended CCA stage. However, for other modes to enter the extended CCA stage, optionally, when the station enters the extended CCA from the non-initial CCA stage, the station generates a random back-off N value and directly enters the delay period CCA detection (the flow is not illustrated in FIG. 7). Out).

Other processes can refer to Figure 1.

After adopting this process, the problems mentioned in the first method can be overcome.

Way six

Referring to FIG. 12, based on FIG. 1, the station enters an extended CCA stage, the station generates a random back-off N value, and the station performs a CCA time slot detection. When the detection is idle, the station enters a delay period CCA detection. When detected as busy, the station repeatedly performs the detection of the one CCA slot.

The above approach is for the site to enter the extended CCA phase from the initial CCA. It can also be applied to other ways to enter the extended CCA stage. However, for other modes to enter the extended CCA stage, optionally, when the station enters the extended CCA from the non-initial CCA stage, the station generates a random back-off N value and directly enters the delay period CCA detection (the flow is not illustrated in FIG. 8). Out).

Other processes can refer to Figure 1.

In the sixth method, compared with the first method, the detection time of the station can be shortened. For example, in Figure 1, after the random back-off N value is generated, the station directly performs the delay period CCA detection. The duration of one delay period is (16+n*9)us, and the station needs to detect the longest (16+n*9). After us can get free, or at least need to perform 16us detection to get idle, and then decide whether to enter the next link. In mode 6, only one CCA slot (9us) detection is needed to determine whether it is idle, thereby determining whether to proceed to the next step. The sixth method can lead to the conclusion of whether to enter the next link in advance, so the time of the entire detection can be shortened, thereby indirectly improving the spectrum efficiency.

Mode 6 can also overcome the problems mentioned in Mode 1.

Way seven

The delay period CCA duration in the extended CCA is (16+n*9)us. For mode seven, based on the flow structure of mode six (Fig. 8), the site configuration in mode 7 reduces the delay period CCA duration by one 9us CCA slot, and the reduced one 9us CCA slot can be considered to be placed in A CCA slot before the delay period was replaced.

Mode 7 has the feature of mode six to shorten the detection time.

Other processes can refer to Figure 1.

Way eight

The delay period in the extended CCA is defined as (n*9+16)us, where 9 represents a CCA slot and 16 represents a 16us CCA detection. Thus, the delay period CCA detection in the extended CCA becomes: first, n CCA slots are executed, and if they are all idle, a 16us CCA detection is performed. If idle, the entire delay period CCA is detected as idle. If any one of the CCA slots detects busy, it can be considered that the CCA is detected as busy during this delay period.

Mode 8 directly adopts the flow of Figure 1. In this way, the efficiency of shortening the detection time can also be achieved.

In the case of no conflict, the foregoing modes 1 to 8 can be used in combination.

Embodiment 1

A structure of a delay period. The structure consists of n consecutive 9us CCA slots followed by a 16us CCA detection.

When the station detects that n slots are idle and the CUS detection of 16us is idle, the delay period CCA is detected as idle. When the station detects that any one of the CCA slots is busy, the station considers that the CCA is detected as busy during this delay period. At this point, the site can immediately start the next CCA slot test. That is to say, when the station can determine that the CCA slot being detected is busy, the station will immediately perform the next CCA slot detection, thereby shortening the time.

Embodiment 2

Based on Figure 1, the configuration of the extended CCA stage delay period and the initial CCA stage delay period is performed in accordance with the structure of 16us + n * 9us. In this embodiment, it is proposed to modify the internal delay period of the extended CCA stage. For example, the configuration in the delay period at this time is performed in accordance with the structure of n*9us+16us. The remaining unfinished processes still use Figure 1. Where n*9us means n A 9us CCA slot, 16us means to perform a CCA detection with a duration of 16us.

In this way, the above-mentioned mode 8 is realized, which is advantageous for shortening the detection time of the whole listening and speaking, and the saving time can be used for transmitting data, thereby improving spectrum efficiency.

Embodiment 3

Based on Figure 1, when the site configures or selects the CCA detection of the initial CCA phase delay period of 16us+9us, then the site correspondingly configures or selects the extended CCA phase delay period of 16us+9us+9us for CCA detection. duration. It can be used only when the N value randomly generated by the station is 0 (other N values can also be used, and N=0 is the most efficient). The remaining steps still follow Figure 1.

If the delay period of the site configuration or selection of the initial CCA phase is 16us+9us+9us, then the delay period of the station correspondingly configuring or selecting the extended CCA phase is 16us+9us+9us (this is because n is not 1, so Configure the duration equal to the delay period of the initial CCA stage) or 16us+9us+9us+9us (this always stays 9us longer than the delay period of the initial CCA stage).

This can achieve the purpose of the first method.

The application also provides a counting rule for adaptively adjusting the LBT contention window size.

The basic idea is that when a station performs LBT, when a time slot is not observed, the station is not idle (ie, busy) for the time slot according to the unlicensed carrier in the time slot.

When the station calculates a parameter for adjusting the size of the LBT competition window, the busy state of the time slot is not used as a basis for increasing or decreasing the parameter.

The parameter is: the number of busy slots, or the number of busy periods.

The busy period is defined as: the total amount of time between two idle slots during which the medium is determined to be busy, or one The equivalent definition is: a set of consecutive busy CCA slots.

When the station calculates a parameter for adjusting the size of the LBT contention window, the busy state of the time slot is not used as a basis for increasing or decreasing the parameter, including: when the number of timeslots whose parameters are busy, the time slot is not calculated as busy. The number of busy slots does not increase or decrease; for a number of busy periods, the slot is not counted as part of a busy period or busy period.

This time slot exists as a CCA slot in the station observation window and is calculated in the number of CCA slots. Alternatively, the time slot is not used as a CCA time slot within the observation window and is not counted in the number of CCA time slots. Alternatively, the duration of the time slot is not part of the duration of the observation window.

The calculation formula for calculating the size of the competitive fallback window may include:

Method 1: Measured amount = number of busy cycles;

Mode 2: metrics = number of busy cycles / number of CCA slots;

Mode 3: metrics = number of busy slots;

Mode 4: metrics = number of busy slots / number of CCA slots;

Mode 5: Measured amount = number of time slots;

Mode 6: Measured amount = cumulative time of busy;

Mode 7: Measured amount = cumulative time of busy / duration of observation window;

Mode 8: Measured amount = accumulated time of idle;

Mode 9: Measured amount = cumulative time of idle / duration of the observation window.

The cumulative duration of busy includes the accumulation of time when the unlicensed carrier is busy within the specified time period. At this time, the above-mentioned time slots which are not observed and considered to be busy are not accumulated.

The accumulated accumulation time of idle includes the accumulation of the time when the unlicensed carrier is idle during the execution time period.

The metric is a predetermined threshold, which is a constant, or is related to a random back-off N value, or is related to the current contention window. When the metric is greater than the threshold, the competition window is adjusted. When the metric is less than the threshold, the contention window is reduced or restored to the initial contention window size.

After the station determines the priority corresponding to the LBT according to the QoS (Quality of Service) level of the service, if the site uses the parameter corresponding to the priority, for example, the minimum contention back-off window does not obtain the unlicensed carrier usage right for consecutive k times, The station can then use a higher level LBT priority parameter to compete for the next unlicensed carrier usage rights. Optionally, the value of k is 3.

After the station determines the priority corresponding to the LBT according to the QoS class of the service, if the station uses the priority to obtain the unlicensed carrier usage right for consecutive k times, and each time the usage right is obtained, the direct initial CCA phase (based on the cat4 type) is obtained. The right to use the unlicensed carrier. The station can then use a higher level LBT priority parameter to compete for the next unlicensed carrier usage rights. Optionally, The value of k is 2.

When a station transmits a discovery signal (DRS) and simultaneously transmits a PDSCH (Physical Downlink Shared Channel), the station should select a parameter corresponding to the highest LBT priority in the data burst to perform the first listening. Said the mechanism. For example, if the site plans to transmit the burst including DRS and PDSCH, then the station selects the LBT priority corresponding to the highest QoS of the two to preempt the unlicensed carrier. For example, when part of the control information or PDSCH needs to be transmitted in the subframe in which the DRS is located, the station selects the corresponding parameter with the highest LBT priority to execute the LBT.

Performing an LBT for a parameter of an LBT priority corresponding to a physical channel that selects the highest QoS when the transmission includes different physical channels, or the node selects a parameter corresponding to the highest LBT priority of the different physical channels to perform LBT.

A self-delay processing mechanism in the LBT process to improve related processes.

In Figure 1, in the extended CCA phase, there is a "do nothing" process. In conjunction with Figure 1, it can be found that the main feature is that the site performs CCA slot detection. When the detection result is idle, it is randomly rolled back. The N value is not decremented. This approach may have the following risks or problems.

At the site, the flow of Figure 1 is often kept as a non-authorized carrier, but always when the random backoff value N is decremented to a smaller value, such as N=1, do nothing until the data arrives to continue. The decrementing of N is performed, so that the unauthorized carrier usage right is obtained quickly and with high probability, and the data purpose is transmitted. But think about it, if the do nothing is not restricted, all sites will get the right to use the unlicensed carrier as described above. Then it will inevitably lead to competition conflict between the sites, that is, multiple neighboring sites obtain the right to use at the same time, forming mutual interference. This has some conflicts with the purpose of the introduction of the random fallback mechanism. In order to overcome or alleviate the above problems, the following method can be used.

Mode 1: When there is data in the buffer of the site to be sent, the site allows the self-delay mechanism to be executed when the site executes the process of Figure 1.

Mode 2: When the LBT mechanism in FIG. 1 performs the exclusive use of the unlicensed carrier, the number of times the self-delay processing is performed cannot exceed the predetermined threshold. The predetermined threshold is a value of N randomly generated when the LBT is executed; or a function of an N value, such as N/2, N/3 (rounding when not a whole integer), or the size L of the contention window when performing LBT, or an L value Functions, such as L/2, L/3 (rounding when not an integer) Wait.

Mode 3: Self-delay processing is used only when the site is multi-carrier aggregation, frequency reuse, and unlicensed carrier competition when uplink multi-user multiplexing.

Mode 4: When the station performs LBT, the generated random backoff N value is greater than the preset threshold to allow self-delay processing. The preset threshold is a constant value, or the predetermined threshold is a function of the size L value of the contention window when performing LBT, such as L/2, L/3 (rounding when not a whole integer), and the like.

Mode 5: When the station arrives only when the data arrives (there is data in the buffer), the station can perform the listening and speaking mechanism to compete for the unlicensed carrier. The behavior of the data in the buffer is: the Mac (Media Access Control) layer notifies or triggers the physical layer, and the data arrives, and the time point is t0. The physical layer starts the LBT process starting from the time point of t0 or t0+t1. Referring to Figure 1, for example, the starting point is t0, then the time position of the first CCA slot is t0+9us (t0 is the starting point and the duration is 9us). If the detection is idle, the time position of the delay period is t0+9us+(16). +n*9)us (t0+9us is the starting point, (16+n*9)us is the duration). Regardless of whether the test result is busy or idle, the time position of each CCA slot or delay period can be predetermined. The time position of the subsequent CCA slot or delay period and so on.

Mode 6: When the station (the UE side) obtains the determined planned transmission time, the station can perform the flowchart 1 as the contention unlicensed carrier. For example, after receiving the uplink authorization information of the base station, the UE may determine the sending time point of the uplink data according to the received uplink authorization information, and then the UE may perform the listening and speaking mechanism after receiving the uplink authorization information, and allow the data to be sent at the time of the data transmission. The self-delay function was previously executed.

As shown in FIG. 18, the embodiment of the present invention further provides a method for implementing listening and speaking, including:

Calculating the metric according to the detection result of detecting whether the unlicensed carrier is idle in each preset period in the observation window; determining that the calculated metric is greater than the preset threshold, increasing the competition window, and adopting the expanded competition window Realize the process of listening first.

Among them, the expansion of the competition window can be, but is not limited to, doubled, or exponentially increased, or linearly increased.

When it is determined that the calculated metric is less than or equal to the preset threshold, the competition window is reduced or the competition window is adjusted to the minimum value, and the competition window after the small adjustment is used to implement the process of listening first.

Wherein, the competition window is reduced by, but not limited to, doubled, or exponentially reduced, or linearly reduced.

The calculating the metric according to the detection result of detecting whether the unlicensed carrier is idle in each preset period in the observation window includes:

Determining the number of preset periods in which the measurement result is busy, or the preset period is the number of CCA slots, or the number of preset periods in which the detection result is busy and is a CCA slot, or the accumulation result is busy accumulation Duration, or cumulative time when the test result is idle;

Or the ratio between the number of preset periods that are busy and the number of CCA slots in the observation window, or the number of preset periods in which the detection result is busy and is a CCA slot and the CCA slot in the observation window. The ratio between the quantities, or the ratio between the accumulated cumulative duration of the busy and the length of the observation window, or the ratio between the cumulative duration of the idleness and the duration of the observation window.

The preset period in which the detection result is busy may be the time of each adjacent CCA slot and/or 16 μs in which the detection result is busy.

The accumulated time length in which the detection result is busy refers to the cumulative time length in which the detection result in the observation window is busy, and the accumulated accumulation time in which the detection result is idle refers to the accumulated time length in which the detection result in the observation window is idle.

Among them, the observation window refers to the time that the station begins to compete to compete for the unlicensed carrier.

Optionally, the priority level of the first listening and the speaking is determined according to the service quality level of the service, and the parameter corresponding to the determined priority level is used to implement the process of listening first; and determining the parameter corresponding to the determined priority level. The minimum contention window does not obtain an unlicensed carrier for consecutive k1 times, or judges that the parameter corresponding to the determined priority level is obtained for the unlicensed carrier in the initial CCA phase continuously, and the priority level is increased after the first listening, wherein K1, k2 are integers greater than or equal to one.

Wherein, the priority level that can be said after listening can be determined as the quality of service level of the service.

The parameters corresponding to the priority level mentioned first include the maximum value of the contention window, the minimum value of the contention window, and n.

Optionally, the transmission discovery signal DRS may also be determined, and the priority level after the first listening is adjusted to the highest priority level.

Optionally, it is also determined that different physical channels are simultaneously transmitted, and the priority level that is first heard and then said is adjusted to a priority level corresponding to the physical channel with the highest quality of service level.

As shown in FIG. 19, an embodiment of the present invention further provides an apparatus for implementing listening and speaking, including at least:

The functions of the second computing module, the sixth determining module, and the adjusting module may be implemented by a processor executing a program/instruction stored in a memory, and may also be implemented by a firmware/logic circuit/integrated circuit.

In the apparatus of the embodiment of the present invention, the sixth determining module is further configured to: determine that the calculated metric quantity is less than or equal to a preset threshold, and send a sixteenth notification message to the adjusting module;

The adjustment module is further configured to: receive the 16th notification message, adjust the competition window to a small value or adjust the contention window to a minimum value, and use the competition window after the small adjustment to implement the process of listening first.

In the apparatus of the embodiment of the present invention, the second calculating module is configured to:

In the device of the embodiment of the present invention, the device further includes: a determining module, configured to determine, according to a service quality level of the service, a priority level that is said to be heard first, and a parameter corresponding to the determined priority level to implement a process of listening first;

The sixth judging module is further configured to: determine that the minimum contention window in the parameter corresponding to the determined priority level does not obtain the unlicensed carrier for consecutive k1 times, or determine that the determined priority level is used. The required parameter obtains an unlicensed carrier in the initial CCA phase for consecutive k2 times, and sends a seventeenth notification message to the adjustment module; wherein k1, k2 are integers greater than or equal to 1;

The adjustment module is further configured to: receive the seventeenth notification message, and increase the priority level after the first listening.

The function of the determining module may be implemented by a processor executing a program/instruction stored in the memory, and may also be implemented by a firmware/logic circuit/integrated circuit.

In the apparatus of the embodiment of the present invention, the sixth determining module is further configured to: determine the transmission discovery signal DRS, and send the eighteenth notification message to the adjustment module;

The adjustment module is further configured to: receive the eighteenth notification message, and adjust the priority level that is first heard and then to the highest priority level.

In the apparatus of the embodiment of the present invention, the sixth determining module is further configured to: determine that different physical channels are simultaneously transmitted, and send a nineteenth notification message to the adjusting module;

The adjustment module is further configured to: receive the nineteenth notification message, and adjust the priority level after the first listening to the priority level corresponding to the physical channel with the highest quality of service level.

As shown in FIG. 20, the embodiment of the present invention further provides a method for implementing listening and speaking, including:

For example, how to determine whether there is data in the buffer area to be sent by a person skilled in the art is not limited to the scope of protection of the present application, and details are not described herein again.

The media access control (MAC) layer may send a notification message to the physical layer to determine whether the data arrives. When the physical layer receives the notification message, it determines that the data arrives, and the physical layer does not receive the notification. When the message is received, it is judged that the data has not arrived.

The base station may send the sending moment of the data to the terminal by using the uplink grant information.

The number of times the self-delay mechanism is executed may be limited to be less than or equal to a preset threshold.

The preset threshold may be a function of generating a random backoff value or a random backoff value (eg, N/2, N/3, etc.), or the size of the contention window q, or a function of the size of the contention window (eg q/2, q/3, etc.).

The self-delay mechanism means that in step 107 and step 108 in FIG. 1, after N is equal to 1, the value of N is no longer subtracted by 1, and no detection is performed, that is, nothing is done.

By the above method, the possibility of competition conflict between sites is reduced by limiting the number of times each site performs a self-delay mechanism.

As shown in FIG. 21, an embodiment of the present invention further provides an apparatus for implementing listening, including at least:

The functions of the seventh determining module and the executing module may be implemented by a processor executing a program/instruction stored in the memory, and may also be implemented by a firmware/logic circuit/integrated circuit.

The embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions, and when the computer executable instructions are executed, the method for implementing the embodiment shown in FIG. 2 is implemented.

The embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions, and when the computer executable instructions are executed, the method for implementing the embodiment shown in FIG. 3 is implemented.

The embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions, and when the computer executable instructions are executed, the method for implementing the embodiment shown in FIG. 4 is implemented.

The embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions, and when the computer executable instructions are executed, the method of implementing the embodiment shown in FIG. 5 is implemented.

The embodiment of the present invention further provides a computer readable storage medium, where computer executable instructions are stored, and when the computer executable instructions are executed, the implementation of the embodiment shown in FIG. 6 is implemented. method.

The embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions, and when the computer executable instructions are executed, the method for implementing the embodiment shown in FIG. 18 is implemented.

The embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions, and when the computer executable instructions are executed, the method of implementing the embodiment shown in FIG. 20 is implemented.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct related hardware (e.g., a processor), which may be stored in a computer readable storage medium, such as a read only memory, disk or optical disk. Wait. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, the modules/units in the foregoing embodiments may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement their respective functions, or may be implemented in the form of a software function module, for example, executing a program stored in the memory by the processor/ Instructions to achieve their corresponding functions. Embodiments of the invention are not limited to any specific form of combination of hardware and software.

It should be noted that the above-mentioned embodiments are only for the purpose of facilitating the understanding of those skilled in the art, and are not intended to limit the scope of the present application, and those skilled in the art will Any obvious substitutions and improvements made by the application are within the scope of the present application.

Industrial applicability

The embodiment of the present application provides a method and a device for implementing listening and speaking, which improves the fairness of competition with the WiFi system.

Claims

A method of implementing listening and speaking, including:

The station detects whether the unlicensed carrier is idle in the designated CCA time slot of the initial idle channel evaluation CCA phase; if not, generates a random backoff value;

The station detects whether the unlicensed carrier is idle in the first delay period, and if yes, proceeds to the step of determining whether the random backoff value is equal to 0; wherein the duration of the first delay period is [16+9×( n+k)] microseconds μs, n is an integer greater than or equal to 1, k is an integer greater than or equal to 0, and when n is equal to 1, k is equal to 1.
The method of claim 1, when the unlicensed carrier is detected to be idle in a designated CCA slot of the initial CCA phase, the method further comprising:

Determining, by the station, whether the unlicensed carrier is idle in a second delay period, and if not, continuing to perform the step of detecting whether the unlicensed carrier is idle in a designated CCA slot in an initial CCA phase; wherein The duration of the second delay period is (16 + 9n) μs.
The method according to claim 2, when it is detected that the unlicensed carrier is idle during the second delay period, the method further includes:

The station transmits a data packet and proceeds to perform the step of determining whether to continue the transmission.
The method of claim 1 wherein k is equal to 0 or 1 when said n is greater than one.
The method of claim 1, wherein the station detecting that the unlicensed carrier is idle during the first delay period comprises:

The station first performs (n+k) times of detecting the CCA time slot on the unlicensed carrier, if idle is detected (n+k) times, and the unlicensed carrier is detected to be idle within 16 μs. ;

Alternatively, the station first detects that the unlicensed carrier is idle within 16 μs, and then performs (n+k) times of detecting the CCA time slot on the unlicensed carrier, if (n+k) times are detected. idle.
A method of implementing listening and speaking, including:

The station detects the unlicensed carrier within the designated CCA slot of the initial idle channel assessment CCA phase. Whether it is idle; if not, it generates a random backoff value;

The station detects whether the unlicensed carrier is idle in the designated CCA time slot of the extended CCA phase, and if yes, detects whether the unlicensed carrier is idle in the second delay period or the third delay period, and if yes, continues to execute The step of determining whether the random backoff value is equal to zero.
The method of claim 6 further comprising: before the station detects that the unlicensed carrier is idle in a designated CCA slot of the extended CCA phase, the method further comprising:

The station determines whether the random backoff value is equal to 0, and when it is determined that the random backoff value is equal to zero.
The method according to claim 7, when the station determines that the random backoff value is not equal to 0, the method further includes:

The station performs the step of detecting whether the unlicensed carrier is idle during the second delay period.
The method according to claim 6 or 7, wherein the duration of the second delay period is (16 + 9n) microseconds μs, n is an integer greater than or equal to 1, and the duration of the third delay period Is [16+9×(n-1)]μs;

The station detecting that the unlicensed carrier is idle during the second delay period or the third delay period includes:

The station first performs detection of n or (n-1) times of CCA slots for the unlicensed carrier, if idle is detected if n or (n-1) times, and the unlicensed carrier is detected again Idle in 16μs;

Alternatively, the station first detects that the unlicensed carrier is idle within 16 μs, and then performs n or (n-1) times of detecting the CCA slot on the unlicensed carrier, if n or (n-1) Idle is detected every time.
The method according to claim 6, when the station detects that the unlicensed carrier is busy in a designated CCA time slot of the extended CCA phase, the method further includes:

The station proceeds with the step of detecting whether the unlicensed carrier is idle within a designated CCA slot of the extended CCA phase.
A method of implementing listening and speaking, including:

The station detects the unlicensed carrier within the designated CCA slot of the initial idle channel assessment CCA phase. Whether it is idle, if not, a random backoff value is generated; wherein the generated random backoff value is greater than or equal to 1, and less than or equal to q, q is the size of the contention window;

The station detects whether the unlicensed carrier is idle in the second delay period, and if yes, proceeds to the step of determining whether the random backoff value is equal to 0; wherein the duration of the second delay period is (16+9n) Seconds μs, n is an integer greater than or equal to 1.
The method of claim 11, wherein the random backoff value is greater than or equal to 0 and less than or equal to (q-1) when the station determines to continue transmitting data packets.
A method of implementing listening and speaking, including:

The station detects whether the unlicensed carrier is idle in the designated CCA time slot of the initial idle channel evaluation CCA phase, and if not, generates a random backoff value;

The site adds a random backoff value to one;

The station detects whether the unlicensed carrier is idle in the second delay period, and if yes, continues to perform the step of determining whether the random backoff value after adding 1 is equal to 0; wherein, the duration of the second delay period is (16) +9n) microseconds μs, where n is an integer greater than or equal to one.
The method according to claim 6 or 11 or 13, when it is detected that the unlicensed carrier is idle in a designated CCA slot of the initial CCA phase, the method further includes:

The station detects whether the unlicensed carrier is idle during the second delay period, and if not, proceeds to perform the step of detecting whether the unlicensed carrier is idle in the designated CCA slot of the initial CCA phase.
The method of claim 14, when it is detected that the unlicensed carrier is idle during the second delay period, the method further includes:

The station transmits a data packet and determines whether to continue the transmission, and if not, proceeds to the step of determining whether data needs to be transmitted.
The method according to claim 15, when the station determines to continue to transmit the data packet, the method further includes:

The station generates the random backoff value, detects that the unlicensed carrier is idle in the second delay period, and continues to perform the step of determining whether the random backoff value is equal to zero.
A method of implementing listening and speaking, including:

The station detects whether the unlicensed carrier is idle in the designated CCA time slot of the initial idle channel evaluation CCA phase, and if so, detects whether the unlicensed carrier is idle in the second delay period, and if not, generates a random backoff value; The duration of the second delay period is (16+9n) microseconds μs, and n is an integer greater than or equal to 1;

The station detects whether the unlicensed carrier is idle during the second delay period, and if so, proceeds to the step of determining whether the random backoff value is equal to zero.
A device that implements listening and speaking, including:

The first detecting module is configured to detect whether the unlicensed carrier is idle in the designated CCA time slot of the initial idle channel evaluation CCA stage, if not, send the first notification message to the first generating module; and detect the unlicensed carrier in the first delay Whether the time period is idle, if yes, sending a second notification message to the first determining module, wherein the duration of the first delay period is [16+9×(n+k)] microseconds μs, and n is greater than or An integer equal to 1, k is an integer greater than or equal to 0, and when n is equal to 1, k is equal to 1;

a first generating module, configured to receive the first notification message, and generate a random backoff value;

The first determining module is configured to receive the second notification message, and continue to perform the step of determining whether the random backoff value is equal to zero.
The apparatus of claim 18, wherein the first detecting module is further configured to:

When it is detected that the unlicensed carrier is idle in a designated CCA time slot of the initial CCA phase, detecting whether the unlicensed carrier is idle in a second delay period, and if not, continuing to perform the detection non-authorization The step of whether the carrier is idle in a designated CCA slot of the initial CCA phase; wherein the duration of the second delay period is (16+9n) μs.
The apparatus of claim 19, wherein the first detecting module is further configured to:

When it is detected that the unlicensed carrier is idle in the second delay period, sending a third notification message to the first sending module;

The device further includes: a first sending module, configured to receive the third notification message, and transmit a data packet;

The first determining module is further configured to: continue to perform the step of determining whether to continue the transmission.
The apparatus of claim 18, wherein the first detection module is configured to:

Detecting whether the unlicensed carrier is idle in the designated CCA time slot of the initial CCA stage, if not, sending the first notification message to the first generating module; first performing (n+k) times of the CCA to the unlicensed carrier Detection of the gap, if idle is detected (n+k) times, and the unlicensed carrier is detected to be idle within 16 μs; or, the unlicensed carrier is first detected to be idle within 16 μs, and then the non- The authorized carrier sequentially performs detection of (n+k) times of CCA slots, and if idle detection is detected (n+k) times, the second notification message is sent to the first determining module.
A device that implements listening and speaking, including:

a second detecting module, configured to detect whether the unlicensed carrier is idle in a specified CCA time slot of the initial idle channel assessment CCA phase, and if not, send a fourth notification message to the second generating module; detecting that the unlicensed carrier is expanding Whether the specified CCA time slot is idle in the CCA phase, and if yes, detecting whether the unlicensed carrier is idle in the second delay period or the third delay period, and if yes, sending a fifth notification message to the second determining module;

a second generating module, configured to receive the fourth notification message, and generate a random backoff value;

The second determining module is configured to receive the fifth notification message, and continue to perform the step of determining whether the random backoff value is equal to 0.
The device according to claim 22, wherein

The second determining module is further configured to: determine whether the random backoff value is equal to 0, and if yes, send a sixth notification message to the second detecting module;

The second detecting module is configured to: detect whether the unlicensed carrier is idle in a designated CCA time slot of the initial CCA stage, and if not, send a fourth notification message to the second generating module; and receive the sixth notification message, Detecting whether the unlicensed carrier is idle in the designated CCA time slot of the extended CCA phase, and if yes, detecting whether the unlicensed carrier is idle in the second delay period or the third delay period, and if yes, proceeding to the second determining module Send a fifth notification message.
The device according to claim 23, wherein

The second determining module is further configured to: determine that the random backoff value is not equal to 0, and send a seventh notification message to the second detecting module;

The second detecting module is further configured to: receive the seventh notification message, and perform the detecting The step of whether the unlicensed carrier is idle during the second delay period.
The apparatus of claim 22 wherein said second detection module is configured to:

Detecting whether the unlicensed carrier is idle in a designated CCA time slot of the initial CCA stage, and if not, transmitting a fourth notification message to the second generation module; detecting whether the unlicensed carrier is idle in the designated CCA time slot of the extended CCA phase If yes, the detection of the CCA time slot of n or (n-1) times is performed on the unlicensed carrier, if the idle is detected in n or (n-1) times, and the non-detection is detected again. The authorized carrier is idle within 16 μs; or, the unlicensed carrier is first detected to be idle within 16 μs, and then the unlicensed carrier is sequentially subjected to detection of n or (n-1) times of CCA slots, if n or ( If the idle is detected, the fifth notification message is sent to the second determining module.
The apparatus according to claim 22, wherein said second detecting module is further configured to:

Detecting that the unlicensed carrier is busy within a designated CCA slot of the extended CCA phase, and continuing to perform the step of detecting whether the unlicensed carrier is idle within a designated CCA slot of the extended CCA phase.
A device that implements listening and speaking, including:

a third detecting module, configured to detect whether the unlicensed carrier is idle in a specified CCA time slot of the initial idle channel evaluation CCA stage, if not, send an eighth notification message to the third generating module; and detect the unlicensed carrier in the second extension Whether the time period is idle, if yes, sending a ninth notification message to the third determining module; wherein, the duration of the second delay period is (16+9n) μs, and n is an integer greater than or equal to 1;

The third generating module is configured to receive the eighth notification message, and generate a random backoff value; wherein the generated random backoff value is greater than or equal to 1, and less than or equal to q, q is a size of the contention window;

The third determining module is configured to receive the ninth notification message, and continue to perform the step of determining whether the random backoff value is equal to zero.
A device that implements listening and speaking, including:

a fourth detecting module, configured to detect whether the unlicensed carrier is idle in a specified CCA time slot of the initial idle channel evaluation CCA stage, if not, send a tenth notification message to the fourth generating module; and detect that the unlicensed carrier is in the second extension Whether it is idle during the time period, and if so, to the fourth mode The block sends an eleventh notification message; wherein, the duration of the second delay period is (16+9n) μs, and n is an integer greater than or equal to 1;

The fourth generating module is configured to receive the tenth notification message, and generate a random backoff value;

a first calculation module, configured to add a random backoff value by one;

The fourth judging module is configured to receive the eleventh notification message, and continue to perform the step of determining whether the random backoff value after adding 1 is equal to 0.
A device that implements listening and speaking, including:

a fifth detecting module, configured to detect whether the unlicensed carrier is idle in a designated CCA slot of the initial idle channel evaluation CCA phase, and if yes, detecting whether the unlicensed carrier is idle in the second delay period, if not, And sending a twelfth notification message to the fifth generation module; wherein, the duration of the second delay period is (16+9n) μs, n is an integer greater than or equal to 1; detecting the unlicensed carrier in the second delay period Whether it is idle, if yes, sending a thirteenth notification message to the fifth determining module;

a fifth generation module, configured to receive the twelfth notification message, generating a random backoff value;

The fifth determining module is configured to receive the thirteenth notification message, and continue to perform the step of determining whether the random backoff value is equal to zero.
A method of implementing listening and speaking, including:

Calculating the metric according to a detection result of detecting whether the unlicensed carrier is idle in each preset period in the observation window;

It is judged that the calculated metric is greater than the preset threshold, and the competition window is adjusted to be large, and the competition window after the adjustment is used to realize the process of listening first.
The method of claim 30, when it is determined that the calculated metric is less than or equal to the preset threshold, the method further includes:

The competition window is reduced or the competition window is adjusted to a minimum value, and the competition window after the small adjustment is used to implement the process of listening first.
The method according to claim 30 or 31, wherein the calculating the metric according to the detection result of detecting whether the unlicensed carrier is idle in each preset period in the observation window comprises:

Determining, by the quantity, the number of preset periods in which the detection result is busy, or the preset period is the number of CCA slots for the idle channel evaluation, or the number of preset periods in which the detection result is busy and is a CCA slot, or detecting The result is the cumulative duration of the busy, or the cumulative length of time when the test result is idle;

Or the ratio between the number of preset periods that are busy and the number of CCA slots in the observation window, or the number of preset periods in which the detection result is busy and is a CCA slot and the observation window The ratio between the number of CCA slots, or the ratio between the cumulative duration of the busy and the duration of the observation window, or the ratio between the cumulative duration of the idle and the duration of the observation window. .
The method of claim 30, further comprising:

Determining the priority level after listening to the service according to the service quality level of the service, and implementing the process of listening first and then using the parameter corresponding to the determined priority level;

Determining that the minimum contention window in the parameter corresponding to the determined priority level fails to obtain the unlicensed carrier for consecutive k1 times, or determines that the parameter corresponding to the determined priority level is used to obtain the unlicensed carrier in the initial CCA phase continuously for k2 times. The priority level will be raised first, where k1, k2 are integers greater than or equal to 1.
The method of claim 30, further comprising:

It is judged that the transmission discovery signal DRS is adjusted to the highest priority level after the first listening.
The method of claim 30, further comprising:

It is determined that different physical channels are transmitted at the same time, and the priority level that is first heard and then said is adjusted to the priority level corresponding to the physical channel with the highest quality of service level.
A device that implements listening and speaking, including:

a second calculating module, configured to calculate a metric according to a detection result of detecting whether an unlicensed carrier is idle in each preset period in the observation window;

The sixth determining module is configured to determine that the calculated metric is greater than a preset threshold, and send a fifteenth notification message to the adjusting module;

The adjustment module is set to receive the fifteenth notification message, and the competition window is adjusted to be large, and the competition window after the adjustment is implemented to realize the process of listening first.
The device according to claim 36, wherein

The sixth determining module is further configured to: determine that the calculated metric quantity is less than or equal to the preset threshold, and send a sixteenth notification message to the adjusting module;

The adjusting module is further configured to: receive the sixteenth notification message, reduce the contention window or adjust the contention window to a minimum value, and use a competition window that is adjusted to achieve the first listening and then speaking. process.
The apparatus according to claim 36 or 37, wherein said second calculation module is configured to:

Determining, by the quantity, the number of preset periods in which the detection result is busy, or the preset period is the number of CCA slots, or the number of preset periods in which the detection result is busy and is a CCA slot, or the detection result is busy. The cumulative duration, or the cumulative length of time that the test result is idle;

Or the ratio between the number of preset periods that are busy and the number of CCA slots in the observation window, or the number of preset periods in which the detection result is busy and is a CCA slot and the observation window The ratio between the number of CCA slots, or the ratio between the cumulative duration of the busy and the duration of the observation window, or the ratio between the cumulative duration of the idle and the duration of the observation window. .
The device of claim 36, further comprising:

Determining a module, setting a priority level according to a service quality level of the service, and using a parameter corresponding to the determined priority level to implement a process of listening first;

The sixth judging module is further configured to: determine that the minimum contention window in the parameter corresponding to the determined priority level does not obtain the unlicensed carrier for consecutive k1 times, or determine that the parameter corresponding to the determined priority level is consecutive Acquiring an unlicensed carrier in the initial CCA phase, sending a seventeenth notification message to the adjustment module; wherein k1, k2 are integers greater than or equal to 1;

The adjustment module is further configured to: receive the 17th notification message, and increase the priority level after the first listening.
The device according to claim 36, wherein

The sixth determining module is further configured to: determine a transmission discovery signal DRS, and send an eighteenth notification message to the adjustment module;

The adjustment module is further configured to: receive the 18th notification message, and then listen to the first The first level is adjusted to the highest priority.
The device according to claim 36, wherein

The sixth determining module is further configured to: determine that different physical channels are simultaneously transmitted, and send a nineteenth notification message to the adjusting module;

The adjusting module is further configured to: receive the nineteenth notification message, and adjust the priority level that is first heard and then to the priority level corresponding to the physical channel with the highest quality of service level.
A method of implementing listening and speaking, including:

Determining that there is data to be sent in the buffer area, or performing unlicensed carrier contention in multi-carrier aggregation or frequency reuse or uplink multi-user multiplexing, or determining that the generated random backoff value is greater than or equal to a preset threshold value, The self-delay mechanism is allowed to be executed after the time when the data arrives or the determined time for sending the data is obtained.
The method of claim 42, wherein the number of times the self-delay mechanism is performed is less than or equal to the predetermined threshold.
A device that implements listening and speaking, including:

The seventh judging module is configured to determine that there is data to be sent in the buffer area, or to perform unlicensed carrier competition when multi-carrier aggregation or frequency reuse or uplink multi-user multiplexing, or determine that the generated random backoff value is greater than or After being equal to the preset threshold, or determining that the data arrives, or obtaining the determined time for sending the data, sending a twentieth notification message to the execution module;

The execution module is configured to receive the twentieth notification message, allowing the self-delay mechanism to be performed.